My instinct is that sprinkler system vendors will tell you that they
have the magic bullet and it would all be fine if only...
However, the best that I think a sprinkler system might achieve in these
circumstances would be to slow down the spread of the fire to
neighbouring vehicles until the fire brigade arrives. A dense water
misting system might be better at slowing down the fire with much less
water used but can also be very disorienting to anyone caught up in it.
That might have been good enough to avoid catastrophic failure - I don't
know. I think the enquiry into it will be very interesting (it should
report by the middle of the century if Grenfell is any guide). Airport
fire brigade training and kit is very good on fighting kerosene fires
with foam so I'm a bit surprised that it all got so far out of hand.
Problem is burning fuel floats on water and you could end up spreading
the fire instead. Water based fire extinguishers are only any good for
smashing open locked firedoors (that is what I was taught). A wastepaper
basket fire is about all they can be used on but they tick a box.
Solvent fires require correct use of the right extinguisher. General
advice is unless you are trained or know exactly what to do is beat a
hasty retreat and raise the alarm. Only worth tackling a solvent fire if
you know what you are doing and it is safe to do so. And you should
raise the alarm first - always making sure you have a path to retreat.
It would take a dry powder extinguisher to take down a car fire even at
the early stages and you must aim at the base of the fire for it to be
effective. Untrained people often aim too high partly because of the
recoil of discharge and a tendency to point it at the flames.
A CO2 extinguisher might take it down if you got there soon enough and
knew exactly what you were doing. The ultimate car fire extinguisher was
a tiny 8" cylinder of BCF (now banned under the Montreal protocol).
Our instructor took out a 16' square tray of waste solvent fire with a
few puffs of BCF after the same fire had been tackled with 6 dry powder
(success), 8 CO2 (just failed), 12 water (massive flare up). It was by
far the most impressive and exciting safety courses I have ever been on.
--
Martin Brown